town, capital of Sikkim state, northeastern India. It lies at an elevation of 5,600 feet (1,700 metres), and its name means “Top of the Hill.” The town rises over slopes extensively terraced in corn (maize). It was the governmental seat of the kingdom of Sikkim until the monarchy was abolished (1975) and Sikkim was annexed by India (1976).

Gangtok's population includes Nepalese, Tibetans, Lepchas, and Indians. The town serves as a market centre for corn, rice, pulses, and oranges. It was an important point on the India-Tibet trade route via Nathu Pass (Nathu-la), 13 miles (21 km) northeast, until the border with Tibet was closed in 1962. The pass was reopened for trade, however, in 2006. From Gangtok the North Sikkim Highway (1962) reaches the Tibetan border areas via Lachung and Lachen, and the National Highway runs southwest to India.

Gangtok's townscape is marked by the former royal palace and chapel, two monasteries, the open-air Lall Market, the Namgyal Institute of Tibetology (1958; a centre for research in Mahayana Buddhism, including a library and a museum), and the Cottage Industries Institute (1957). The noted Buddhist monastery of Rumtek is 5 miles (8 km) southwest, and the royal cremation ground is at nearby Lukshiyama. Also nearby is the Do-drul Chorten (Do-drul Stupa), built by Tibetan Buddhists in the 1940s; its gold-topped stupa (commemorative monument) is encircled by 108 prayer wheels. Gangtok has government-maintained nurseries for cardamom—an important export from the state—and subtropical fruits, and there is an experimental agricultural station at Tadong, to the south. The town's Deorali Orchid Sanctuary houses some 200 species of orchids found in Sikkim. Pop. (2001) 29,354.